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https://issues.apache.org/jira/browse/MAPREDUCE-5883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14607556#comment-14607556
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Hadoop QA commented on MAPREDUCE-5883:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  15m 35s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:red}-1{color} | tests included |   0m  0s | The patch doesn't appear 
to include any new or modified tests.  Please justify why no new tests are 
needed for this patch. Also please list what manual steps were performed to 
verify this patch. |
| {color:green}+1{color} | javac |   7m 50s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |  10m  5s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 22s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 38s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with 
eclipse:eclipse. |
| {color:red}-1{color} | mapreduce tests |   1m 41s | Tests failed in 
hadoop-mapreduce-client-core. |
| | |  37m 47s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.mapreduce.lib.db.TestDbClasses |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12643763/MAPREDUCE-5883.patch |
| Optional Tests | javadoc javac unit |
| git revision | trunk / d3797f9 |
| hadoop-mapreduce-client-core test log | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5859/artifact/patchprocess/testrun_hadoop-mapreduce-client-core.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5859/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5859/console |


This message was automatically generated.

> "Total megabyte-seconds" in job counters is slightly misleading
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-5883
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5883
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Nathan Roberts
>            Assignee: Nathan Roberts
>            Priority: Minor
>              Labels: BB2015-05-TBR
>         Attachments: MAPREDUCE-5883.patch
>
>
> The following counters are in milliseconds so "megabyte-seconds" might be 
> better stated as "megabyte-milliseconds"
> MB_MILLIS_MAPS.name=               Total megabyte-seconds taken by all map 
> tasks
> MB_MILLIS_REDUCES.name=            Total megabyte-seconds taken by all reduce 
> tasks
> VCORES_MILLIS_MAPS.name=           Total vcore-seconds taken by all map tasks
> VCORES_MILLIS_REDUCES.name=        Total vcore-seconds taken by all reduce 
> tasks



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